Sewage Map

Ashwater STW So Ashwater

Storm overflow operated by South West Water. The source names (S) River Carey as the receiving water.

104
Spills in 2025
855.5
Recorded hours
100%
Monitor operation
5
Years listed

The reported spill count was 7 higher than in 2024. This compares event counts, not discharge volume.

Current status unknown

Checking the latest monitor report…

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How it compares in 2025

Ashwater STW So Ashwater recorded 104 spills in 2025. That is more than 98% of the 14,239 overflows in England with a reported figure, and ranks 219th nationally. Among South West Water overflows it ranks 87th of 1,357; the median South West Water overflow recorded 21 spills.

GroupRank by spillsMedian spillsMedian hours
This outlet–104855.5
England219th of 14,2391122.3
South West Water87th of 1,3572139.4

Rank 1 has the most spills. Equal counts share a rank. Only overflows with a reported count are ranked. Counts do not measure volume, so a higher rank does not mean more sewage.

Annual spill history

n/a2021020224220239720241042025
From 2022 to 2025, the reported count went from 0 to 104 spills. The highest count was 104 in 2025 and the lowest was 0 in 2022. The monitor worked for less than 90% of 2023, so that count may be low.Amber bars mark years when the monitor worked for less than 90% of the year.
YearSpillsDurationMonitor operationSource
2025104855.5 hours100%Official data
202497537 hours100%Official data
202342438 hours62.8%Low coverageOfficial data
202200 hours100%Official data
2021UnknownUnknownUnknownOfficial data

A missing figure means the source did not provide a usable value. A zero is shown as zero. Monitor operation below 90% can make comparison less reliable.

Outlet details

Water company
South West Water
Outlet type
Inlet storm overflow at a wastewater treatment works
Permit
NRA-SW-6738
Activity reference
A2
Grid reference
SX39299530
Waterbody ID
GB108047008040Official waterbody record ↗
Location source
Official annual grid reference
Location precision
About 10 metres
Location note
Unknown

About the name and type

The annual return lists this asset as “Inlet SO at WwTW”: inlet storm overflow at a wastewater treatment works. The overflow is at the inlet of a treatment works, where wastewater enters the works.

The waterbody link opens the Environment Agency record for the exact ID in the return. It is a source lookup; we do not import its classification.

Where it is

The recorded position is about 6.8 km south-west of the Halwill Junction reference point in the ONS built-up areas data.

Area and water pages

Check the official record

Public access to this outlet is unknown. Do not enter restricted land or use this page as a route guide.

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Other outlet records nearby

Questions about Ashwater STW So Ashwater

Who operates Ashwater STW So Ashwater?
South West Water is the operator named in the annual record. The permit reference is NRA-SW-6738.
Where does Ashwater STW So Ashwater discharge?
The source names (S) River Carey as the receiving water. This does not show how far a discharge travelled.
How many times did Ashwater STW So Ashwater spill in 2025?
The 2025 return records 104 counted spill events and 855.5 hours of recorded discharge. Spills are counted with the 12/24-hour method, so this is not a count of every start signal.
Can I trust the 2025 figures for this outlet?
The monitor worked for 100% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
Is Ashwater STW So Ashwater discharging right now?
This record is linked to a company live feed. The panel above shows the latest report we hold, with its date. That report can be old, and the monitor can be offline, so check the date before relying on it. A report that no discharge is taking place is not a water-quality result.
How accurate is the map marker?
The marker comes from the grid reference in the official annual return, which is accurate to about 10 metres. It shows the recorded outlet position, not the extent of any discharge.
What kind of outlet is Ashwater STW So Ashwater?
The annual return lists the asset type as “Inlet SO at WwTW”, which means inlet storm overflow at a wastewater treatment works. The overflow is at the inlet of a treatment works, where wastewater enters the works.
How does Ashwater STW So Ashwater compare with other overflows?
Ashwater STW So Ashwater recorded 104 spills in 2025. That is more than 98% of the 14,239 overflows in England with a reported figure, and ranks 219th nationally. Among South West Water overflows it ranks 87th of 1,357; the median South West Water overflow recorded 21 spills. Ranks compare counted spill events only. They do not compare volume or harm.
Does zero spills mean the water was safe?
No. A zero means the annual return recorded zero counted spill events for this outlet and year. It is not a water-quality test, and pollution can come from other sources.